- Rule version, by effective date
- Each certification computes under the rule version in force on its own effective date — not the date the case opened, not the date someone published the rules. The determination on the audit tab names the version, its effective-from date, the certification date, and why that version and not an earlier one.
- Verification, by hierarchy
- EIV and other upfront sources first, then tenant-provided documents, then a written request to the source, then oral, then self-certification — the Notice H 2023-10 (Rev. 3) order, cited on the gate when a person has to choose the next level down.
- Notices, on the calendar
- 120 / 90 / 60 days before the anniversary, per Handbook 4350.3 chapter 7 — each one on the case record with who it went to, when, how it was delivered, and whether the link was opened.
- Every request, closed out
- Every document request and every verification the platform sent stays visible on the case, resolved with exactly how and when it was satisfied — or escalated to a person when it was not. Nothing is silently dropped.
- Arithmetic, declared
- Income, deductions, the imputed-asset test, and total tenant payment are declared calculations over named inputs — every intermediate lands on the record. No one reads a spreadsheet to reconstruct how the rent was reached.